Allmusic: Interpol
Biography, and discography with reviews.
http://www.allmusic.com/cg/amg.dll?p=amg&sql=Bhq63mpbh9f7o

Interpol Concert Chronology
Listing of all tour dates with setlists.
http://www.stthomas1976.net/interpol/

InterpolArchives.com
Fan site with news, articles, photographs, discography, and polls.
http://www.mickelcurepol.com/interpol.php

Yahoo! Groups : Interpol Fan Club
Mailing list for discussion of the band and their music. [Registration required]
http://launch.groups.yahoo.com/group/interpol-fan-club/

Slave to the Details
Tour dates, lyrics, biographies, and forum.
http://www.interpoltheband.com/

Interpol Does Not Investigate
Weblog featuring news and reviews.
http://community.livejournal.com/interpol_nyc/